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PREFLIGHT CHECK

Mercari Shops half-width space CSV checker

Find half-width spaces outside product name and description fields, a documented Mercari Shops import error cause.

Check file

Analysis stays in your browser; the file itself is not sent to BlueprintLab.

What this tool checks

  • Find half-width spaces outside product name and description fields, a documented Mercari Shops import error cause.

What it cannot verify

Live service-side state, account-specific settings, remote server reachability and current master data are not asserted. Always prefer the latest official service information.

About this tool

Mercari Shops half-width space CSV checker is a free browser-based preflight utility from BlueprintLab Tools. Find half-width spaces outside product name and description fields, a documented Mercari Shops import error cause.

No account is required. File contents are processed locally in your browser whenever possible.

How to use

  1. Choose the target file.
  2. Run the check.
  3. Review detected issues and fix the source file if needed.